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Hydraulic control valves
Hydraulic Pressure-Sustaining and Relief Valve
A pilot-controlled valve operated by line-water pressure for pressure relief or upstream pressure-sustaining service. Applications include high-rise buildings, residential developments and municipal water systems.
SizesDN50–600
PressurePN10 / PN16 / PN25
Temperature0 to 80 degrees C
Valve typeHydraulic control valves
Specifications
Nominal pressurePN10 / PN16 / PN25
Shell test pressure1.5 / 2.4 / 3.75 MPa (PN10 / PN16 / PN25)
Seat test pressure1.1 / 1.76 / 2.75 MPa (PN10 / PN16 / PN25)
Opening/closing pressure differential0.1 MPa or less
Mediumwater
Temperature0 to 80 degrees C
Size rangeDN50–600
Control assemblya relief/sustaining pilot, needle valve, ball valve, small strainer and pressure gauge
Where it is used
Dimensions and ratings
Face-to-face length
Pick a size to read its dimensions.
Full table
| DN | L (mm) |
|---|---|
| 50 | 230 |
| 65 | 290 |
| 80 | 310 |
| 100 | 350 |
| 125 | 400 |
| 150 | 480 |
| 200 | 600 |
| 250 | 730 |
| 300 | 850 |
| 400 | 1100 |
| 450 | 1200 |
| 500 | 1250 |
| 600 | 1450 |
For a quotation, send us
Request a quote- Size
- Pressure rating
- Medium and temperature
- Connection standard
- Quantity
Good to know
- In relief service, the valve responds to excess pressure to limit supply-line pressure relative to its setpoint. In pressure-sustaining service, it controls flow to maintain upstream water pressure relative to its setpoint.
- The required function depends on the selected pilot arrangement and installation.
Specifications are for preliminary selection. Final configuration and ratings are subject to quotation and technical confirmation.
